A ring gauge is a measuring tool used to inspect the outer diameter of cylindrical workpieces or thread dimensions. It is typically ring-shaped, with an inner bore of precise size or thread profile. In foreign trade, ring gauges are commonly imported and exported as precision measuring tools and fall under the category of industrial gauges. Application scenarios include quality control in machining, automotive parts, aerospace, and other industries. Notes: Ring gauges are usually divided into go gauges and no-go gauges and must be used as a set; they are mostly made of alloy steel or carbide and require rust prevention; different countries adopt different standards (such as ISO, DIN, ANSI), so specifications must be clearly stated. Difference from plug gauges: ring gauges measure outer diameter/external threads, while plug gauges measure inner diameter/internal threads. Foreign trade contracts should specify standards, accuracy grade, material, and calibration certificate requirements.
📝 Examples
1. We urgently need to purchase a batch of thread ring gauges conforming to DIN 7164 standards. Please provide a quotation and delivery time. (Note: specifies the standard, used for a procurement inquiry)
2. The customer requires the ring gauges to be accompanied by an ISO 17025-accredited calibration certificate; otherwise, customs clearance cannot be completed. (Note: emphasizes certification requirements, used for quality compliance)
💡 Foreign Trade Tips
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